18. What is the pH of a solution of 0.20 M nicotinic acid, HC6H4NO2 at 25°C....
nicotinic acid is a monoprotic weak acid with the formula Hc6H4NO2. A solution that in 0.012 M in nicotinic acid has a pH of 3.39. calculate the ionization constant (Ka) for nicotinic acid. HNic + H2O <---> H3O + Nic
1. Calculate the pH at 25°C of a 0.757 M solution of a weak acid that has Ka = 9.28 x 10 2. Determine the Kb of a weak base if a 2.50 M solution of the base has a pH of 9.595 at 25°C. 3. The overall dissociation of malonic acid, H2C3H2O4, is represented below. The overall dissociation constant is also indicated. H2C3H204 = 2 H+ + C3H2042- K = 3.0 x 10-9 To a 0.025-molar solution of malonic...
Calculate the pH of a solution containing 2.5 x 10– 2 mol of nicotinic acid (a monoprotic acid) dissolved in 350 mL of water. ( Ka = 1.1 x 10- 5). The answer is 3.05. Please Help
Calculate the Ka (aq., 25 °C) of a 0.250 M weak acid whose pH is 3.86. The base-ionization constant of ethylamine (C2H5NH2) is 6.4 x 10-4 at 25.0 °C. The [H+) in a 1.6 x 10-2 M solution of ethylamine is M.
ormation 38. What is the pH of a 0.20 M solution of NH? K = 18 x 10 for NH. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen present in the molecule, effect of bond strength: K. B) Stability of the conjugate acid; bond polarity (H-X bond), effect of bond dissociation C) Stability of the conjugate base, amount of hydrogen in the molecule, bond polarity...
a) What is the pH of a solution that consist of 0.20 M ammonia, NH3, and 0.20 M ammonium choride, NH4Cl? (Kb for ammonia is 1.8 x 10-5) b) 1.25 g of benzoic acid (C6H5CO2H) and 1.25 g of sodium benzoate (NaC6H5CO2) are dissolved in enough water to make 250 mL solution. Calculate the pH of the solution using the Handerson-Hasselbach equation (Ka for benzoic acid is 6.3 x 10-5). c) What is the pH after adding 82 mg of...
What is the percent ionization of a 0.0741 M solution of a weak acid if the weak acid ionization constant, ka, is 2.0 x 10at 25 °C? Select one: a. 0.038% b. 0.30 % c. 1.4% d. 0.52% e. 5.2%
a) The degree of ionization of acetic acid (CH3COOH) in a 0.1 M aqueous solution at 25 oC is 0.013. Ka 1.7 X 10-5. What is the ph of this solution? What is the deg of ionization b) A solution is prepared to be 0.1 M acetic acid CH,COOH and 0.2 M CHCOONa. What is the pH of this solution at 25°C ? K, for acetic acid at this temperature -1.7 X10
15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBrO, at 25°C is 4.17. What is the value of K for HBro? a) 2.0 x 10 b) 1.1 x 10 c) 1.08 x 10° d) 7.34 x 10 e) 6.8 x 10 16) The molar concentration of hydronium ion in pure water at 25°C is (á) 1.0 x 10? b) 0.00 c) 1.0 x 1024 d) 1.0 e) 7.00 117) A solution is prepared by dissolving 0.23...
What is the pH of a solution that consists of 0.50 M H2C6H6O6 (ascorbic acid) and 0.75 M NaHC6H6O6 (sodium ascorbate)? What is the pH if 20.0 mL of a 0.280 M perchloric acid is added to 200.mL of the ascorbic acid sodium ascorbate solution? What is the pH if 30.0 mL of a 0.125 M sodium hydroxide is added to 200.mL of the ascorbic acid sodium ascorbate solution? The ionization constant for ascorbic acid is 6.8 x 10–5